Cheer up!Sister Kokoa who seduces with plump ass appears.Kokoa-chan, who has a small body, spends her days playing with her beloved older brother.No matter what you do, if your brother wants it, he will accept it with a smile! ?One day, he gets lustful for her too cute little sister and his brother puts his hands on her little sister.The older brother brings out the rotor and attacks her Kokoa-chan's sensitive areas!Hearing the pant voice emitted from her sister, the older brother gets more excited and her actions escalate ... What will happen to Kokoa-chan! ?